You know what I mean? Not just the FF and Rewind buttons that you must hold down to fast forward/rewind, but one that works like the volume meter, where you drag your finger horizontally to where in the song you want it to be.

I've done a bunch of searching, and came up w/ a bunch of stuff, but nothing just like this. All I want to be able to do is scroll through the song thats currently playing, while the phone is locked